Improvement in machines for cutting and finishing marble



AM. PHOTO-LITHU. CU. ILY. (OSBURN E'S PROCESS.)

UNITE Srarns arsnr rrrcna JAMES W. MLOY, OF BOSTON, MASSACHUSETTS.

IMPROVEMENT IN MACHINES FOR CUTTING AND FINISHING MARBLE.

To all whom it may concern:

Be it known that I, JAMES W. MALOY, of Boston, in the county of Suffolkand State of Massachusetts, have invented certain new and usefulImprovements in Machines for Cutting and Finishing Marble, &c. 5 and Ido hereby declare that the following description, taken in connectionwith the accompanying plate of drawings, hereinafter referred to, formsa full and exact specification of the same, wherein I have set forth thenature and principles of my said improvements, by which my invention maybe distinguished from all others of a similar class, together with suchparts as I claim and desire to have secured to me by Letters Patent.

My improvements are represented in the accompanying` plate of drawings,ofwhich Figure l is a top view, Fig. 2 a side elevation, Fig. 3 a frontelevation, and Fig. t a central vertical transverse section, of myimproved machine. Figs. 5, 6, 8, 9, l() are detail views of the severalimplements used on the said machine for cutting, grinding, and polishingthe marble, 85e.

The present invention has for its objects the cutting and finishing ofthe edges of slabs of marble and other similar material by machinery inlieu of the mode of hand labor ordinarily heretofore practiced, theresults attained being economy in the manufacture and a nearer approachto perfection in the work produced.

The following description, in detail, of the construction and operationof my new machinery for working the edges of marble slabs, 85e., willfully explain its essential features.

a a a, in the drawings represent the framework of my new machine. b b isa vertical. shaft supported by and turning in standards c c and d cl.The shaft b l is actuated by a belt on the drum e e, and has on itsupper end a bevel-gear,ff, which engages with two other similar gears, gg and 7L h, attached to and operating a horizontal shaft, z' z', whichturns in and is supported by standards lc la. On the ends of the shaft bb are formed worms Z l, which engage with gears m. m, connected with andoperating screw-shafts a n, placed at right angles to the shaft z' t',and which turn in and are supported by bearings formed by the sides ofthe frame a a.

On the sha-fte' t', between the gears g g and h h, is a clutch, o o,having teeth p p formed on its ends. This clutch o 0 is allowed to playlaterally either way on the shaft i t', so as to engage with or bedisengaged from the gears y g g and 7L h, for the purpose of reversingthe motion ofthe shaftt' t'. The clutch o 0 is operated by means of rodsq q, attached to a plate, r r, formed with slots s s, which play backand forth over pivots t t. To the bottom of the plate r r is attached anarm, u u, which connects with a groove, fu, formed in the center of theclutch o o.

x a: are traveling tables or platforms so constructed as to traveltransversely upon or longitudinally with under tables or platformsfz/ yon suitable ways z z and a a', attached, re-

spectivel y, to the platforms y y and frames b 'b'. The lateral returnmovement of the upper tables or platforms, x m, is induced by spiralsprings c o', attached to both ends of the tables x x and y y. The uppertables, x x, are connected with and held to the lower tables, y y, bythe guides or ways z z, and both are fed along laterally by means ofhalf-screw nuts d d', engaging with the screw-shafts a u. The screw-nutsd d playon pivots e e', supported by standards ff, formed on plates gg', which are attached to the under sides of the lower tables orplatforms, y y, and are made to engage with or be disengaged from thescrewshafts n u by means of cams h h', that can be brought to bearagainst or be loosened from the sides of the screw-nuts d d. The saidcams h h are connected to rods f t', which pass through and find abearing or support in the lower portion of the screw-nuts cl d', and areoperated by handles lo lc', attached to the opposite ends of the rods t"t. Springs l l are formed on the pivots e e. between the upper portionsof the screw-nuts cl d', for the purpose of throwing apa-rt the separatesections of the screw-nuts d d when the cams l1.l h are loosenedtherefrom.

Attached toV cross-bars m m are boxes n n', that form bearings forscrew-nuts o o', which engage with and operate vertical screw-shafts g qin such a manner as to raise and lower, but not to revolve them,`therotation of the screw-shafts q g being prevented by dogs r r', thatengage with slots s s', formed in the circumferences of the shafts g g.The tops of the screw-shafts q q .form steps or seats upon which restthe bottoms of vertical shafts or spindles t' t, having dogs u a', whichrevolve in and yet are held by slots o' t in the clamps w w on the topsof the screw-shafts q q. The shafts t t are rotated by belts on thedrums x w', and are raised or lowered according as the shafts q q areelevated or depressed by the operation of the screw-nuts o o. Theseshafts or spindles t t extend up through the top of the table a a, andscrew-threads are cut on their ends to receive and hold either of theimplements y y,z z', and a a, used for preparing and nishing the marbleb b.

y y,Figs. l and 5, represent the implement used for cutting the marble,Src., of any particular form of molding. Vrlhe teeth, being made ofthedesired shape and independently of each other, are held in place uponthe shafts t' t by washers c c and d d", placed above and below thecutters y y and nuts c" c, which screw down upon the upper washers, oc". Cutters y'y, Fig. 6, formed in a single piece and of any desiredshape, can also be used.

z z, Figs. 8 and 9, represent an implement used in sanding and rubbingor grinding the marble, Ste., and is screwed on the shaft t t and heldby a nut and washer.

a a, Fig. 10, is a buffer. of felt or other suitable material, made toiit on and revolve vwith the shafts t t for the purpose of polishing andfinishing the marble, Ste., after being cut and sanded or rubbed by theimplements y y and z z.

The device zz is made hollow, as shown in Fig/8, to receive the sand orother material used in rubbing, which is made-to pass out throughapertures f f, &c., formed in its bottom, which ext-end in an inclineddirection through the outer periphery of the lower portion of the tool zz', which is formed of the required shape of the molding, and made toscrew onto the upper portion of the tool z z.

A pivot, g( g, is attached to the center of the table ct a, upon whichan arm, h" 7L, is made to turn or be raised or lowered thereon, and issecurely held in any desired position by means of a screw, fi, workingin the end of the arm L/ 7L. On the other end of the arm h" 7L, at rightangles with the same, are prongs k" 7u, which fit into the box z z, forthe purpose of preventing the sand, Src., from fiying out and to pressit through the aperturesff, 85e.

The tops of the upper platforms, or m, are formed with grooves l" l andm 9u" at right angles with each other, in which are held in any desiredposition or allowed to travel either transversely or longitudinally thebottom plates,fn/ n, of screws 0 0, which work vertically in the ends oflever-arms p p, the other ends of which pass through slots g q, formedin standards r r, the, bottom plates, s s, of which are also held by orallowed to travel in the grooves l Z and m on". rlhe lever-armspp turnupon pivots t t, passing through their opposite ends and attached tostandards u u, formed on plates fu t, which are pressed upon andsecurely hold the marble b b" in place by means of the pressure exertedupon the lever-armspp by screws w w, which work through the tops of thestandards r r, and are brought to bear upon the said lever-arms pp. Theplates s s are adjusted to the required thickness of the marble on whichthey rest by raising or lowering the lever-arms p p, to which they areattached, by means of the screws o o, that operate the same.

From the foregoing description, reference being made to the drawings, itwill be seen that the marble b b or other material to be operatedupon,bein g placed on the upper table or platform, .fr x, is securelyheld thereon by the pressure exerted by the screw to w upon thelever-arm 1)19, the plate o 'v" being adjusted to the proper height bymea-ns of the screw o o", working in the opposite end of the leverarm pp". lhe cutter y' y', being fixed on the shaft or spindle t t', betweenthe washers c c and d d, is held thereon by the nut c e, and is revolvedwith the shaft t t by means of a belt connected with the drum w mi. Theshaft t t is adjusted to the required thickness of the marble, Ste., bymeans of the screwshaft q q', operated by the screw-nut o o', in such amanner as to raise o r lower the said shaft Q q', but not to rotate it,as hereinbefore described. The marble b b, or other material employed,is brought to bear with a firm and constant pressure against thc cuttery y by means of thelateral force exerted by the springs c c upon thetable or platform a: 00, which travels transversely on the ways z z. VItis fed along longitudinally,together with the upper and lower tables orplatforms as a: and y y, by the motion imparted to the screw-shaft u nby the power applied to the drum e e of the shaft t' L', which rotatesthe gears ff, g g, and h h, and revolves the shaft t' t', worm Z I, andgear m m, attached to the screw-shaft n n.

By disconnecting the clutch 0 o from one gear, g g, and engaging it withthe other, h h, the motion of the shaft t i is reversed; or bydisengaging it from both they may be thrown wholly out of gear.

By unlocking the half screw-nuts d d', the tables a; .fr and y y aredisengaged from the screw-shaft q q and are allowed to play freely backand forth on their ways z z and a a.

The marble b b being cut to the form of the molding desired,the tables x.fr and y y are disengaged from the screw-shaft q q' by the means abovedescribed, and are pushed back to their original position. The cutter yy is then removed from, and the box z/ z is attached to, the shaft t tand supplied with sand or other grinding material, and the marble is fedalong as before. The box z z revolves with the shaft t t against themarble, which is brought to bear against it by the lateral pressureexerted upon the tables x x and y y, thereby rubbing the sand whichpasses through the apertures f f &;c, upon the slab, and effecting thedesired result.

rI he arms or prongs 7c 7c", formed at right angles with the arm h h",are turned so as to lit over and into the boX c z in such a manner as toallow afree passage for the sand between them, and at the same time toprevent its being thrown out of the box z z as it revolve-s. After themarble has been suciently sanded and rubbed by the process abovedescribed, the boX z z is removed and replaced by the polisher or buffera a, which is revolved against the marble as it is fed along', theoperation being performed in a manner precisely similar to that alreadydescribed for the cutting and rubbingr of the marble.

It will be obvious that by making the teeth of the cutter y y separate,so as to be easily inserted between the washers c" c and d d on theshaft t t', anyone can be readily taken out for sharpening` or repairingor for inserting a new one without displacing the remainder.

It is evident that the apparatus can be made;

with any desired number ofspindles, carriages, &c., although but twosets have been hereinabove described. Moreover, while one or more slabsare beingcut others can at the same time be rubbed or polished.

Having thus described my improvements, I shall state my claims asfollows:

What Iclaim as myinvention, and desire to have secured to me by LettersPatent, is-

l. The combination of a revolving` tool or tools with a feeding table orplatform susceptible of t'wo motions, one tangential to the circledescribed by the said revolving tool or tools and the other at rightangles to that of the rst, as set forth and for the purpose specied.

2. The combination of the two traveling tables or platforms, operatingtogether as described.

3. So arranging and operating the table or platform that supports themarble or other material to be acted upon as to convey the latterautomatically to the revolving tool or tools.

4. The arrangement of the clutch-nut d d', screw-shaft g q', revolvingshaft t' t', and vertical shaft b b, operating as described, for thepurpose of feeding the traveling table along and yet permit itsdisengagement from the said devices, as specified.

5. The use of the adjustable lever swivelclamp for holding the materialto be acted upon firmly in its place, as described.

6. The use of a revolving, 0minding, or rubbing cylinder, so arrangedand constructed as to contain the grinding material and deliver itthrough apertures to the material to bc acted upon, as set forth.

7. In combination with the revolving, grinding, or rubbing tool, thepronged lever-arm 7L It, for the purpose specied.

8. The arrangement of devices for feeding the revolving tool or tools upand down, the same consisting of the screw-shaft q q', screwnut o o',and sha-ft t t', as described.

9. The arrangement of devices for holding the sectional cutters in theirplace and so that they can readily be inserted or removed, as

specified.

JAMES W. MALOY.

Witnesses:

J osEPH GAvE'r'r, SAML. M. BARTON.

